Icing wind tunnel test ice-shaped three-dimensional entity generation method and three-dimensional entity ice

A technology of 3D entity and wind tunnel test, applied in the direction of design optimization/simulation, etc., can solve problems such as difficult processing and complex design of 3D ice in wind tunnel, and achieve the effect of strong practicability and low impact

Active Publication Date: 2020-03-17
CHINA AERODYNAMICS RES & DEV CENT
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to provide a method for generating ice-shaped three-dimensional solids in icing wind tunnel tests and three-dimensional physical ice, so as to solve the problem of complex and complicated three-dimensional ice design in existing wind tunnels. Problems that are difficult to process

Method used

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  • Icing wind tunnel test ice-shaped three-dimensional entity generation method and three-dimensional entity ice
  • Icing wind tunnel test ice-shaped three-dimensional entity generation method and three-dimensional entity ice
  • Icing wind tunnel test ice-shaped three-dimensional entity generation method and three-dimensional entity ice

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Embodiment

[0042] see Figure 1-Figure 6 , the present embodiment provides a method for generating ice-shaped three-dimensional solids in an icing wind tunnel test, which includes the following steps:

[0043] a) choose the two-dimensional contour curve-L1 of the physical ice frozen on the surface of the test piece 10 at the selected cross-section-P1 position; Wing, for example. The intersection curve of section 1 P1 and test piece 10 is curve 2 L2;

[0044]b) Determine a tensile boundary section 2 P2 on both sides of section 1 P1; the intersection lines of the two sections 2 P2 and the test piece are recorded as curve 3 L3; the intersection point of section 1 P1 and the leading edge line S1 of the test piece Denote it as point A, and the intersection of the two sections 2 P2 and the front edge line S1 of the test piece is denoted as point B;

[0045] c) Find out the upper ice angle point, upper limit point and lower limit point on curve one L1; where the upper ice angle point on curv...

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Abstract

The invention relates to the field of icing wind tunnel tests, aims to solve the problems of complex design and high processing difficulty of a wind tunnel three-dimensional ice model, and provides anicing wind tunnel test ice-shaped three-dimensional entity generation method and three-dimensional entity ice. The ice-shaped three-dimensional entity generation method for the icing wind tunnel testcomprises the following steps of selecting physical ice frozen on the surface of a test piece, and selecting a two-dimensional curve which has the largest influence on aerodynamic characteristics ofthe test piece in a specified cross section; determining a stretching boundary section; calculating the scaling of the characteristic parameters of the selected two-dimensional curve at the cross section position of the stretching boundary; drawing a new curve at the cross section position of the stretching boundary according to the scaling ratio; stretching and drawing a three-dimensional entityon the basis of the selected two-dimensional curve and the new curve of the stretching boundary section position; and cutting the three-dimensional entity by using a theoretical shape curved surface of the test piece to obtain a final simulated ice three-dimensional entity. The method has the beneficial effects that the three-dimensional ice model is simplified, and the influence on a result is small when the manufactured solid ice model is applied to a test.

Description

technical field [0001] The invention relates to the field of icing wind tunnel tests, in particular to a method for generating ice-shaped three-dimensional solids in icing wind tunnel tests and three-dimensional physical ice. Background technique [0002] After the icing test of the test piece was carried out in the icing wind tunnel, the shape of the frozen physical ice on the surface was complex, and it was difficult to separate from the test piece as a whole. In order to quickly make an ice model so that it can be pasted on the surface of the test piece for subsequent aerodynamic studies, multiple sections are usually selected in the icing area of ​​the test piece, and the two-dimensional contour curve of the actual ice at each section position is obtained, and then the three-dimensional Based on the above-mentioned two-dimensional curves, the design software approximates the three-dimensional shape of the actual ice. [0003] However, the three-dimensional physical ice ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
Inventor 易贤吴海瀛刘森云王茂梁鉴
Owner CHINA AERODYNAMICS RES & DEV CENT
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